Suggestion regarding our use case

RE: Suggestion regarding our use case

Jørgen Holmefjord — Mon, 04 Sep 2017 09:33:14 GMT

Again, this is all listed in the product specifications. Please read it!.

No, max TX power is +8 dBm for nRF52840. For nRF51 series and nRF52810/nRF52832, the max TX power is +4 dBm.

Receiver sensitivity:

nRF51 series: -93 dBm sensitivity in Bluetooth® low energy mode

nRF52832: -96 dBm sensitivity in Bluetooth low energy mode

nRF52810: -96 dBm sensitivity in Bluetooth low energy mode

nRF52840: -95 dBm sensitivity in 1 Mbps Bluetooth low energy (BLE) mode, -103 dBm sensitivity in 125 kbps BLE mode (long range)

RE: Suggestion regarding our use case

Usman Rashid — Thu, 31 Aug 2017 13:20:46 GMT

Thank you last thing please check if is is correct.

Max Tx power is +4 dBm for all these three chips ?

Receiver sensitivities are also same ?

nRF52840: VDD from 1.7 V to 5.5 V.

RE: Suggestion regarding our use case

Jørgen Holmefjord — Thu, 31 Aug 2017 13:05:52 GMT

The supply voltage is also documented in the product specifications:

nRF51 series: 1.8 V to 3.6 V.

nRF52832/nRF52810: VDD from 1.7 V to 3.6 V.

nRF52840: VDD from 1.7 V to 5.5 V.

RE: Suggestion regarding our use case

Usman Rashid — Thu, 31 Aug 2017 12:59:55 GMT

I also want to know about the power supply what sort of power supply does each chip requires ?

RE: Suggestion regarding our use case

Jørgen Holmefjord — Thu, 31 Aug 2017 12:32:51 GMT

This is the current with highest output power when the radio is active in transmitt mode. You can look at the average current for typical BLE advertising and Connection scenarios in the nRF52 Online Power Profiler.

RE: Suggestion regarding our use case

Usman Rashid — Thu, 31 Aug 2017 12:12:57 GMT

Meaning that it is the case when the chip is running at its maximum capacity ?

RE: Suggestion regarding our use case

Jørgen Holmefjord — Thu, 31 Aug 2017 12:09:42 GMT

The current marked DCDC, is the radio current consumption with DCDC regulator enabled. Note that the DCDC regulator requires additional external components.

RE: Suggestion regarding our use case

Usman Rashid — Thu, 31 Aug 2017 12:05:17 GMT

I am checking the links which you provided above please could you tell me which is the difference between ITX,PLUS4dBM,DCDC and ITX,PLUS4dBM

RE: Suggestion regarding our use case

Jørgen Holmefjord — Tue, 29 Aug 2017 12:11:46 GMT

nRF52840 is not yet available in production variants, but it is possible to develop your application using the nRF52840 Preview Development Kit. There will not be much major changes in your code for running on the final version versus the preview version. The production variant should be available before the end of the year, so depending on your development cycle, it could be available when you have your product finished for production.

RE: Suggestion regarding our use case

Usman Rashid — Tue, 29 Aug 2017 09:08:28 GMT

But NRF52840 is your new IC and not Finnish product as you mentioned previously so it is safe to use it now? When we can get the final product ?

RE: Suggestion regarding our use case

Jørgen Holmefjord — Tue, 29 Aug 2017 09:04:59 GMT

Hi,

In general, nRF52 gives better range and have lower current consumption, but this will depend on configuration. You can compare current consumption of nRF51 and nRF52 by looking at the Electrical specifications in the Product specifications:

nRF51822: 8.5.3 Radio current consumption with DC/DC enabled

nRF52832: Radio current consumption (Transmitter)

nRF52840: Radio current consumption (Transmitter)

Higher output power will give better range, and nRF52840 even support BT5 long-range mode, which can increase range even further.

I would not recommend starting a new design using nRF51 series today. nRF52 series provide much more flexibility, Bluetooth 5 suppoert, and now even comes in a low-cost variant, the nRF52810.

Best regards,

Jørgen